Mr. Philip F. Keebler Profile

Philip F. Keebler

at Electric Power Research Institute Inc

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Proceedings Article | 24 September 2011 Paper

Addressing the variables in LED product design to ensure product reliability

Philip Keebler, Frank Sharp

Proceedings Volume 8123, 81230W (2011) https://doi.org/10.1117/12.894630

KEYWORDS: Solid state lighting, Light sources and illumination, Light emitting diodes, LED lighting, Manufacturing, Product engineering, Reliability, Lamps, Control systems, Distortion

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Continuing developments in LED lighting are leading to more lighting products for illumination in LED fixtures for the residential, commercial, and industrial facilities. Most of the research in the past ten years has been aimed at developing LEDs with higher brightness, higher efficacies, good color performance and longer life. Many efforts have been accomplished to develop LED driver circuits to drive LED arrays, even drivers that are dimmable. Manufacturers are increasing their level of concern with the performance and life of the whole LED product with a renewed emphasis on reliability. Reliability for LED products not only involves thermal management, fixture design, and driver loading but also how products respond to electrical disturbances that occur in the building electrical environments where the products must function. EPRI research has demonstrated that the immunity of LED lighting systems to common everyday electrical disturbances is critical to establishing the reliability needed to ensure expected performance and for their survival during product life. Test results showing the application of voltage surges, transients, and sags among other disturbances will be presented. This paper will discuss the application of the results of EPRI research in this area, the test protocol associated with EPRI system compatibility concept, examples of how applying the concept has identified reliability problems in LED products, and how the reliability of these LED systems can be easily improved.

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